N,N'-dimethylperylene-3,4,9,10-tetracarboxylic acid diimide pigments suitable for water-based paints

US6099636A · kind A · utility

Assignee

• BASF SE

Inventors

• Georg Henning · Ludwigshafen, DE
• Peter Blaschka · Ludwigshafen, DE
• Arno Bohm · Mannheim, DE

Key dates

• Filing date: Jul 16, 1998
• Grant date: Aug 8, 2000
• Expiry date: Jul 16, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D7/41
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A N,N'-dimethylperylene-3,4,9,10-tetracarboxylic diimide pigment suitable for aqueous basecoats is obtainable by coating the diimide, suspended in an aqueous medium, with a carboxyl-carrying resin in the presence of 3,4-dicarboximidoperylene-9-sulfonic acid or salts thereof and with a C.sub.8 -C.sub.8 -alkyl- or-alkenylamine, isolating and drying the coated dimide and then subjecting it to dry milling.